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Finding the Fourth Proportional to 147.91, 222.05 and 105.43

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Solution

The fourth proportional to 147.91, 222.05 and 105.43 is: 158.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.91 : 222.05 = 105.43 : x
  2. Step 2: Convert to fraction form
    147.91/222.05 = 105.43/x
  3. Step 3: Cross multiply
    147.91x = 222.05 × 105.43
  4. Step 4: Simplify right side
    147.91x = 23,410.73
  5. Step 5: Solve for x
    x = 23,410.73/147.91
  6. Step 6: Final answer
    x = 158.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.